patch 8.0.0713: 'termkey' option not fully implemented commit https://github.com/vim/vim/commit/0daf843b4cad734df6be16573423206eae43028b Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jul 15 15:16:40 2017 +0200 patch 8.0.0713: 'termkey' option not fully implemented Problem: 'termkey' option not fully implemented. Solution: Add initialisation.

" Settings for test script execution
" Always use "COMMAND.COM", don't use the value of "$SHELL".
set shell=c:\COMMAND.COM shellquote= shellxquote= shellcmdflag=/c shellredir=>
" This is used only when the +eval feature is available.
if executable("cmd.exe")
   set shell=cmd.exe
endif

source setup.vim